<template>
        <el-container class="home-container">
            <!-- 头部区 -->
          <el-header>
            <div>
              <img src="../assets/heima.png" alt="">
              <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button></el-header>
          <!-- 页面主体区 -->
          <el-container>
              <!-- 侧边栏 -->
          <el-aside :width="isCollapse ? '64px' : '200px'">
            <div class="toggle-button" @click="toggleCollapse">|||</div>
            <el-menu
      background-color="#545c64"
      text-color="#fff"
      active-text-color="#ffd04b"
      router
      :collapse="isCollapse"
      :collapse-transition="false"
      :default-active="activePath"
      unique-opened>
      <!-- 一级菜单 -->
      <!-- :index="item.id + ''" 是对菜单的单一展开的写法，指定唯一的动态index加上''是一个转型的字符串 -->
      <el-submenu
      :index="item.id + ''"
      v-for="item in menulist"
      :key="item.id">
        <!-- 一级菜单模板区 -->
        <template slot="title">
          <!-- 图标 -->
          <i :class="iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
        <el-menu-item :index="'/' + subItem.path + ''"
        v-for="subItem in item.children"
        :key="subItem.id"
        @click="saveNavState('/' + subItem.path)">
          <template slot="title">
          <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{subItem.authName}}</span>
        </template>
        </el-menu-item>
      </el-submenu>
    </el-menu>
    </el-aside>
          <!-- 右侧内容主体 -->
          <el-main>
            <!-- 路由站位符 -->
            <router-view></router-view>
          </el-main>
         </el-container>
       </el-container>
</template>

<script>
export default {
  data () {
    return {
      menulist: [],
      iconsObj: {
        // z左侧菜单数据区
        125: 'iconfont icon-users',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
    },
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container{
    height: 100%;
}
.el-header {
    background-color: #101111;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div {
      display: flex;
      align-items: center;
      span {
        margin-left: 15px;
      }
    }
}
.el-aside {
    background-color: #121213;
    .el-menu {
      border-right: none;
    }
}
.el-main {
    background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
